60 lines
2.4 KiB
C++
60 lines
2.4 KiB
C++
#include <ATen/cuda/CUDAContext.h>
|
|
#include <THC/THC.h>
|
|
#include <torch/extension.h>
|
|
#include <torch/serialize/tensor.h>
|
|
|
|
#include <vector>
|
|
|
|
extern THCState *state;
|
|
|
|
int gather_points_wrapper(int b, int c, int n, int npoints,
|
|
at::Tensor points_tensor, at::Tensor idx_tensor,
|
|
at::Tensor out_tensor);
|
|
|
|
void gather_points_kernel_launcher(int b, int c, int n, int npoints,
|
|
const float *points, const int *idx,
|
|
float *out, cudaStream_t stream);
|
|
|
|
int gather_points_grad_wrapper(int b, int c, int n, int npoints,
|
|
at::Tensor grad_out_tensor,
|
|
at::Tensor idx_tensor,
|
|
at::Tensor grad_points_tensor);
|
|
|
|
void gather_points_grad_kernel_launcher(int b, int c, int n, int npoints,
|
|
const float *grad_out, const int *idx,
|
|
float *grad_points,
|
|
cudaStream_t stream);
|
|
|
|
int gather_points_wrapper(int b, int c, int n, int npoints,
|
|
at::Tensor points_tensor, at::Tensor idx_tensor,
|
|
at::Tensor out_tensor) {
|
|
const float *points = points_tensor.data_ptr<float>();
|
|
const int *idx = idx_tensor.data_ptr<int>();
|
|
float *out = out_tensor.data_ptr<float>();
|
|
|
|
cudaStream_t stream = at::cuda::getCurrentCUDAStream().stream();
|
|
gather_points_kernel_launcher(b, c, n, npoints, points, idx, out, stream);
|
|
return 1;
|
|
}
|
|
|
|
int gather_points_grad_wrapper(int b, int c, int n, int npoints,
|
|
at::Tensor grad_out_tensor,
|
|
at::Tensor idx_tensor,
|
|
at::Tensor grad_points_tensor) {
|
|
const float *grad_out = grad_out_tensor.data_ptr<float>();
|
|
const int *idx = idx_tensor.data_ptr<int>();
|
|
float *grad_points = grad_points_tensor.data_ptr<float>();
|
|
|
|
cudaStream_t stream = at::cuda::getCurrentCUDAStream().stream();
|
|
gather_points_grad_kernel_launcher(b, c, n, npoints, grad_out, idx,
|
|
grad_points, stream);
|
|
return 1;
|
|
}
|
|
|
|
PYBIND11_MODULE(TORCH_EXTENSION_NAME, m) {
|
|
m.def("gather_points_wrapper", &gather_points_wrapper,
|
|
"gather_points_wrapper");
|
|
m.def("gather_points_grad_wrapper", &gather_points_grad_wrapper,
|
|
"gather_points_grad_wrapper");
|
|
}
|